Serengeti MATEOSerengeti Mateo sunglasses feature a sleek, modern navigator style design crafted from lightweight eco acetate with durable 5 barrel hinges. They use ultra light mineral lenses equipped with photochromic, polarized, and Spectral Control technologies for exceptional clarity and adaptive light management. With a comfortable medium fit, a 6 base curve, and multiple frame and lens color optionsincluding 555 nm and Drivers lensesthey offer a refined look